Ultramarathons in Massachusetts, United States in 2026

Scenic 1.9-mile loop at Notchview with a 0.2-mile climb, rolling single and double track, open fields, and cross-country ski trails

Certified dirt and cinder track loop at Clapp Park, eight-hour timed format with direction change at halfway, flexible pacing and on-course support

10-mile singletrack loop through Noon Hill Reservation, diverse terrain and minimal road crossings, near Boston yet set in immersive woodlands

Jug End Loop Trail course with woods, fields, apple orchard, and 830 feet of elevation change per 4.2-mile lap; moderately challenging terrain

Mostly flat 50K and 50-mile courses on scenic New England trails at DCR Great Brook Farm State Park, featuring roots, rocks, and fall foliage.

Double-loop figure-eight 50K in Pittsfield State Forest, with substantial climbing, fast descents, Taconic Crest Trail, and sweeping vistas.

Scenic 1.9-mile groomed loop at Notchview with self-timed laps, access to aid station, and options for 50km, 50-mile, or 24-hour challenges

Looped 4.167-mile course through Needham town forest and Rail Trail, starting hourly from Claxton Field Quarry with no road crossings

Double-track trails through tranquil woodlands and past military bunkers, hard-packed earth and gravel, gentle rolling hills, and moderate elevation gain.

Repeated out-and-back laps on the WWII Veterans Memorial Trail, mixing pavement, gravel and grass with a weight-carry strategy format.

Mixed surfaces through picturesque Norwell, Plymouth landscapes, with sections of paved paths, rail trails, and both single and double track terrain

Inaugural fall ultramarathon on the trails of White Barn Farm, supporting conservation of farm woods and local trails

Double and single track routes through Willowdale State Forest, rugged varied terrain, part of the North Shore Trail Series

Hourly 4.1666-mile loop in Winchendon, backyard ultra format, relaxed camping and communal atmosphere with aid stations and bonfires

6-hour ultramarathon on a 5K loop at Wright Locke Farm, featuring rocky terrain, rolling hills, and goats along the course

Rolling paved and dirt roads in Connecticut’s Northwest Hills, with hilly terrain, Judds Bridge out-and-back, and New England autumn scenery.

Rugged technical trails with roots, rocks, steep elevation changes, and intermittent Boston skyline views in classic New England woodland

Ten 5K paved loops in Forest Park with limited traffic, possible snow, and flexible distance options on the Snowstorm Classic 5K route